WO2008062989A1 - Procédé d'exploitation d'un système de contenus sur demande - Google Patents

Procédé d'exploitation d'un système de contenus sur demande Download PDF

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Publication number
WO2008062989A1
WO2008062989A1 PCT/KR2007/005832 KR2007005832W WO2008062989A1 WO 2008062989 A1 WO2008062989 A1 WO 2008062989A1 KR 2007005832 W KR2007005832 W KR 2007005832W WO 2008062989 A1 WO2008062989 A1 WO 2008062989A1
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WO
WIPO (PCT)
Prior art keywords
content
cod
transmission
clients
server
Prior art date
Application number
PCT/KR2007/005832
Other languages
English (en)
Inventor
Joo Hyeon Ryu
Original Assignee
Alticast Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alticast Co., Ltd. filed Critical Alticast Co., Ltd.
Priority to US12/513,397 priority Critical patent/US8087056B2/en
Publication of WO2008062989A1 publication Critical patent/WO2008062989A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
    • H04N21/26233—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving content or additional data duration or size, e.g. length of a movie, size of an executable file
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6405—Multicasting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6408—Unicasting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment

Definitions

  • the present invention relates, in general, to a method of operating a Content-
  • On-Demand (COD) system and, more particularly, to a method of operating a Content- On-Demand system which effectively provides content, thereby stably providing a COD service without expanding the capacity of a COD server or extending the bandwidth of a network.
  • Content On Demand is a bidirectional service which enables service subscribers to request and receive desired content (video, music, file, image, and website information) from a service provider at desired times, and Video On Demand (VOD), the provision of which is currently increasing, may be referred to as a representative of COD.
  • VOD Video On Demand
  • VOD systems generally provide all the functions of general video devices, other than the fact that video information is ordered over a network, that is, functions of playing, stopping, pausing, fast forwarding, fast rewinding, and starting to play at an arbitrary portions.
  • services provided by such VOD systems are classified into a Real COD (RCOD) service, in which a predetermined charge is paid for each program, a Subscription COD (SCOD) service, in which a fixed charge is paid for one month while program packages are viewed without limitation as to the number of views, and a Free-On-Demand (FOD) service, which is supplied as marketing means for free.
  • RCOD Real COD
  • SOD Subscription COD
  • FOD Free-On-Demand
  • a COD system as shown in FIG. 1, includes a COD server 10, a COD client 20, and a network 30 for connecting them to each other.
  • the COD server 10 includes a high-capacity content database, and performs functions of searching for content requested by the COD client 20 and transmitting the corresponding content to the COD client 20.
  • the COD client 20 restores and plays the content transmitted from the COD server
  • the network 30 is means for connecting the COD server 10 and the COD client 20 such that communication therebetween is possible, and may include a well-known broadcasting network or information network.
  • the COD server 10 is configured to include a content management unit 11 configured to have a content database and provide content to a content transmission unit 12; the content transmission unit 12 configured to transmit content, provided from the content management unit 11, to one or more COD clients 20a, 20b, 20c, and 2Od over a network 30; and a control unit 13 configured to set up/ terminate sessions between the COD server 10 and the respective COD clients 20a, 20b, 20c, and 2Od, and control the operation of the content management unit 11 and the content transmission unit 12.
  • a content management unit 11 configured to have a content database and provide content to a content transmission unit 12
  • the content transmission unit 12 configured to transmit content, provided from the content management unit 11, to one or more COD clients 20a, 20b, 20c, and 2Od over a network 30
  • a control unit 13 configured to set up/ terminate sessions between the COD server 10 and the respective COD clients 20a, 20b, 20c, and 2Od, and control the operation of the content management unit 11 and the content transmission
  • the control unit 13 determines whether the requested content exists in the content database of the content management unit 11. If the requested content is found not to exist, the control unit 13 transmits a message informing the first COD client 20a that the requested content does not exist. If the requested content is found to exist, the control unit 13 transmits access information for one-to-one transmission, which allows access to the transmission-capable region of the content transmission unit 12, to the first COD client 20a, so that a session is set up between the COD server 10 and the first COD client 20a.
  • control unit 13 controls the operation of the content management unit 11 and content transmission unit 12 and transmits the requested content to the first COD client 20a using the one-to-one transmission-capable region of the content transmission unit 12, for which the session has been set up.
  • control unit 13 terminates the session between the COD server 10 and the corresponding COD client 20 and completes a task for providing the content to the first COD client 20a.
  • the prior art system uses a method of setting up sessions between the COD server 10 and the respective COD clients 20 (20a, 20b, 20c, and 2Od) such that one- to-one transmission is possible between the COD server 10 and the respective COD clients 20 (20a, 20b, 20c, and 2Od) regardless of the type of content requested by the respective COD clients 20 (20a, 20b, 20c, and 2Od).
  • the regions of the content transmission unit 12 are separately allocated to the respective COD clients 20a, 20b, 20c, and 2Od. Accordingly, if specific content (for example, a popular video or the latest video) is overwhelmingly requested for a short time, the capacity of the COD server 10 is exceeded, so that a problem occurs in that a server goes down.
  • specific content for example, a popular video or the latest video
  • an object of the present invention is to provide a method of effectively operating a COD system capable of stably providing a COD service without expanding the capacity of a COD server or extending the bandwidth of a network.
  • the present invention provides a method of effectively operating a Content- On-Demand (COD) system, including a first step of receiving requests for content from one or more COD clients; a second step of, if the requested content exists in a COD server, determining whether the requested content is content for one-to-one transmission or content for one-to-N transmission; a third step of, if the content requested from the COD server is content for one-to-one transmission, setting up a session between the COD server and one of the COD clients by providing access information for one-to-one transmission from the COD server to the corresponding COD client, transmitting the requested content to the corresponding COD client from the COD server in a one-to-one transmission manner, and then terminating the session between the COD server and the corresponding COD client when the transmission is completed; and a fourth step of, if the content requested from the COD server is content for one-to-N transmission, setting up sessions between the COD server and the respective
  • the present invention employs a method of determining whether content requested by one or more COD clients is content for one-to-one transmission or content for one- to-N transmission, transmitting the requested content from a COD server to one of the corresponding COD client in a one-to-one transmission manner in the case in which the requested content is content for one-to-one transmission, and transmitting the requested content from the COD server to corresponding COD clients in a one-to-N transmission manner in the case in which the requested content is content for one-to-N transmission, so that a COD system is effectively managed, with the result that COD services can be stably provided without expanding the capacity of a COD server or extending the bandwidth of a network.
  • FIG. 1 is a view schematically showing a COD system
  • FIG. 2 is a flowchart showing a method of operating a prior art COD system
  • FIG. 3 is a view showing a method of providing the content of the prior art COD system
  • FIG. 4 is a flowchart showing a method of operating a COD system according to the present invention.
  • FIG. 5 is a view showing a method of providing the content of the COD system according to the present invention.
  • FIGS. 4 and 5 are both views showing methods of operating COD systems according to the present invention, the same reference numerals are used to designate the same components throughout the different drawings, that is, FIG. 1, schematically showing the COD system, and FIGS. 2 and 3, showing the prior art, and a description thereof is omitted.
  • a COD server 10 receives requests for content from the COD clients 20
  • Users can select specific content from a list of content provided from the COD server 10 using the respective COD clients 20 (20a, 20b, 20c, and 2Od) or can search for desired content (content that they desire to receive) using search windows provided from the COD server 10. As needed, users can modify the content request method in various ways.
  • the COD clients 20 (20a, 20b, 20c, and 2Od) it is preferable to determine whether the content requested by the COD clients 20 (20a, 20b, 20c, and 2Od) exists in the COD server 10, and, if any requested content does not exist in the COD server 10, inform the corresponding COD clients 20 (20a, 20b, 20c, and 2Od) that the requested content does not exist, so that the users can be made aware the fact that the requested content does not exist.
  • the determination method may be modified and performed in various manners, as needed.
  • the content requested by the COD clients 20 (20a, 20b, 20c, and 2Od) can be simply determined as content for one- to-one transmission or content for one-to-N transmission at this step.
  • the content requested by the respective COD clients 20 (20a, 20b, 20c, and 2Od) can be simply determined as content for one-to-one transmission or content for one-to-N transmission at this step.
  • the content requested by the respective COD clients 20 (20a, 20b, 20c, and 2Od) may be classified as content for one-to-one transmission or content for one-to-N transmission using the program for classifying content into content for one-to-one transmission and content for one-to-N transmission based on a predetermined requirement at this step, so that the content requested by the respective COD clients 20 (20a, 20b, 20c, and 2Od) can be determined as content for one-to-one transmission or content for one-to-N transmission in real time.
  • a requirement used to classify content stored in the COD server 10 into content for one-to-one transmission and content for one-to-N transmission may be modified in various ways, as needed.
  • a reference date is determined in consideration of the date on which the content is provided, and content stored in the COD server 10 is classified into new content and old content based on the reference date, so that the new content, which is expected to be requested by a large number of requesters, may be classified as content for one-to-N transmission, and old content, which is expected to be requested by a small number of requesters, may be classified as content for one-to-one transmission.
  • a reference data value is determined in consideration of the size of the data of content, and content stored in the COD server 10 is classified into high-capacity content and low-capacity content based on the reference data value, so that the high- capacity content, for which the transmission time is expected to be long, may be classified as content for one-to-N transmission, and the low-capacity content, for which the transmission time is expected to be short, may be classified as content for one-to-one transmission.
  • a reference bandwidth value is determined in consideration of the value of the total bandwidth of the COD server 10, content requested by the respective COD clients 20 (20a, 20b, 20c, and 2Od) is classified as content for one-to-one transmission or content for one-to-N transmission in real time using the reference bandwidth value, and the value of currently available bandwidth is compared with the reference bandwidth value. If the value of currently available bandwidth is equal to or greater than the reference bandwidth value, that is, in the state in which excess capacity of the COD server 10 is expected, content requested by the respective COD clients 20 (20a, 20b, 20c, and 2Od) may be classified as content for one-to-N transmission.
  • the COD server 10 counts the number of content requesters during a predetermined time. If the number of requesters for the corresponding content is equal to or greater than the preset reference number of requesters, that is, the number of real-time content requesters is greater than the preset reference number of requesters, the corresponding content may be classified as content for one-to-N transmission.
  • the corresponding content may be classified as content for one-to-one transmission.
  • the 10 is content for one-to-one transmission, setting up a session between the COD server 10 and one of the corresponding COD clients 20 (20a, 20b, 20c, and 2Od) by providing access information for one-to-one transmission from the COD server 10 to the corresponding COD client 20 (20a, 20b, 20c, or 2Od), transmitting the requested content to the corresponding COD client 20 (20a, 20b, 20c, or 2Od) from the COD server 10 in a one-to-one transmission manner, and then terminating the session between the COD server 10 and the corresponding COD client 20 (20a, 20b, 20c, or 2Od) when the transmission is completed.
  • [50] 4 The fourth step of, in the case in which the content requested from the COD server 10 is content for one-to-N transmission, setting up sessions between the COD server 10 and the respective corresponding COD clients 20 (20a, 20b, 20c, and 2Od) by providing access information for one-to-N transmission from the COD server 10 to the corresponding COD clients 20 (20a, 20b, 20c, and 2Od), transmitting the requested content from the COD server 10 to the respective corresponding COD clients 20 (20a, 20b, 20c, and 2Od) in a one-to-N transmission manner when a one-to-N transmission requirement is met, and then terminating the sessions between the COD server 10 and the corresponding COD clients 20 (20a, 20b, 20c, and 2Od) when the transmission is completed.
  • the access information for one-to-N transmission may vary depending on the communication manner, that is, the type of network 30.
  • the access information may include information about a frequency, Transport Stream (TS) IDentification (ID), Packet IDentification (PID, in the case of a single type of packet, such as video or audio), and a program number (in the case in which audio, video, and captions form a single piece of content).
  • TS Transport Stream
  • PID Packet IDentification
  • PID Packet IDentification
  • the access information may include information about a Uniform Resource Locator (URL) and an Internet Protocol (IP) multicast address.
  • URL Uniform Resource Locator
  • IP Internet Protocol
  • the operator or manager of the COD system can freely set the one-to-N transmission requirement, as needed. For example, a time taken for the connection of a session between the COD server 10 and the COD client 20 (20a, 20b, 20c, or 2Od) that first requested the corresponding content is counted, and the counted time taken for the connection of the session is compared with a preset reference time. If the time taken for the connection of the session is equal to or greater than the reference time, it can be determined that the one-to-N transmission requirement is met.
  • the operator or manager of the COD system can freely modify the preset reference time, as needed.
  • the number of COD clients 20 (20a, 20b, 20c, and 2Od) that request the corresponding content is counted, and the accumulated value of the counted number of COD clients 20 (20a, 20b, 20c, and 2Od) is compared with a preset reference value. If the accumulated value is equal to or greater than the reference value, it can be de termined that the one-to-N transmission requirement is met.
  • the operator or manager of the COD system can also freely modify the preset reference value, as needed. Further, as needed, all of the above-described one-to-N transmission requirements can be applied.
  • the time taken for the connection of a session is equal to or greater than the reference time, it is determined that the one-to-N transmission requirement is met. Further, if the accumulated value of the counted number of COD clients 20 (20a, 20b, 20c, and 2Od) is equal to or greater than the reference value, it is determined that the one-to-N transmission requirement is met even though the time taken for the connection of a session is less than the reference time. Furthermore, if the accumulated value of the counted number of COD clients 20 (20a, 20b, 20c, and 2Od) is equal to or greater than the reference value, it is determined that the one-to-N transmission requirement is met. Further, if the time taken for the connection of a session is equal to or greater than the reference time, it is regarded that the one-to-N transmission requirement is met even though the accumulated value is less than the reference value.
  • FIG. 5 shows the state in which content is transmitted from the COD server 10 to the respective COD clients 20a, 20b, 20c, and 2Od using the method of operating a COD system according to the present invention.
  • the transmission of content from the COD server 10 to the first COD client 20a is performed through the one-to-one transmission region of the content transmission unit 12, for which a session is set up, in a one-to-one manner.
  • 20b, 20c, and 2Od is a single piece of content for one-to-N transmission, the transmission of the content from the COD server 10 to the respective second to fourth COD clients 20b, 20c, and 2Od is performed through the one-to-N transmission region of the content transmission unit 12, for which sessions are set up, in a one-to-N manner.
  • COD services can be stably provided without expanding the capacity of the COD server or extending the bandwidth of the network.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Mathematical Physics (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Information Transfer Between Computers (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé d'exploitation efficace d'un système de contenus sur demande (COD). Des demandes de contenus sont reçues de clients (COD). Si le contenu demandé existe dans un serveur COD et que le contenu est le contenu d'une transmission un à un, une session est établie entre le serveur COD et l'un des clients COD en fournissant des informations d'accès pour une transmission un à un. Ensuite, le contenu demandé est transmis au client COD correspondant selon une transmission un à un, et la session est terminée lorsque la transmission a été accomplie. Si le contenu demandé est un contenu d'une transmission un à N, des sessions sont établies entre le serveur COD et les clients COS respectifs en fournissant des informations d'accès pour une transmission un à N. Puis, le contenu demandé est transmis aux clients COD correspondants selon une transmission un à N lorsqu'un besoin de transmission un à N a été satisfait, et les sessions sont terminées lorsque la transmission a été accomplie.
PCT/KR2007/005832 2006-11-20 2007-11-20 Procédé d'exploitation d'un système de contenus sur demande WO2008062989A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/513,397 US8087056B2 (en) 2006-11-20 2007-11-20 Operating method of contents on demand system

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KR20060114233 2006-11-20
KR10-2006-0114233 2006-11-20

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Publication Number Publication Date
WO2008062989A1 true WO2008062989A1 (fr) 2008-05-29

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